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Salmonella enterica serovar Gallinarum biovar Gallinarum causes fowl typhoid in chickens and has been of economic importance to the chicken industry in many countries. The biovar Gallinarum live vaccine strain 9R (SG 9R) has been used to control fowl typhoid in many areas where the disease is endemic. Therefore, a definitive diagnosis of this disease may require differentiation of wild-type field...
Salmonella enterica serovar Gallinarum causes fowl typhoid in chickens and is of economic importance to the chicken industry. A serovar Gallinarum live vaccine strain 9R (SG 9R) has been used to control fowl typhoid in many areas where the disease is endemic. Because the attenuation mechanism of SG 9R was not defined, there has been continued concern about reversion to virulence. In this study, we...
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